Solvent Red 1

Solvent Red 1 Basic information
Product Name:Solvent Red 1
Synonyms:CERES RED G;Solvent Red 1 (C.I.);SUDAN RED G, REAGENT FOR PH EUR;Oil Red N/G;SudanredG=SolventRed1;2-Naphthalenol, 1-(2-methoxyphenyl)azo-;ORTHO-METHOXYPHENYLAZO-BETA-NAPHTHOL;Solvent red 1 (C.I. 12150)
CAS:1229-55-6
MF:C17H14N2O2
MW:278.31
EINECS:214-968-9
Product Categories:Organics;Aromatics;Intermediates & Fine Chemicals;Pharmaceuticals
Mol File:1229-55-6.mol
Solvent Red 1 Structure
Solvent Red 1 Chemical Properties
Melting point 179 °C
Boiling point 421.12°C (rough estimate)
density 1.1222 (rough estimate)
vapor pressure 0Pa at 25℃
refractive index 1.5500 (estimate)
storage temp. room temp
solubility Chloroform (Slightly), Methanol (Very Slightly)
form neat
Colour Index 12150
pka13.61±0.50(Predicted)
color Orange to Brown
Water Solubility 330ng/L at 25℃
BRN 1843558
Stability:Hygroscopic, Light sensitive
LogP7.5
CAS DataBase Reference1229-55-6(CAS DataBase Reference)
EPA Substance Registry System2-Naphthalenol, 1-[(2-methoxyphenyl)azo]- (1229-55-6)
Safety Information
Hazard Codes Xi
Risk Statements 36/37/38
Safety Statements 22-24/25-36-26-S24/25-S22
WGK Germany 2
RTECS GE5844740
HS Code 32129000
Hazardous Substances Data1229-55-6(Hazardous Substances Data)
MSDS Information
ProviderLanguage
Solvent Red 1English
SigmaAldrichEnglish
Solvent Red 1 Usage And Synthesis
Chemical PropertiesSolvent Red 1, also known as Sudan Red G, is a yellowish red lysochrome azo dye. It has the appearance of an odorless reddish-orange powder with melting point 225 °C. It is soluble in fats and used for coloring of fats, oils, and waxes, including the waxes used in turpentine-based polishes. It is also used in polystyrene, cellulose, and synthetic lacquers. It is insoluble in water. It is stable to temperatures of about 100–110 °C. It was formerly used as a food dye, but still appears to be used for this purpose in china. It is used in some temporary tattoos, where it can cause contact dermatitis. It is also used in hair dyes. It is a component of some newer formulas for red smoke signals and smoke-screens, together with Disperse Red 11.
UsesSudan dyes and para red in food. Dyes and metabolites, Environmental Testing.
PreparationO-Anisidine diazotization, and Naphthalen-2-ol coupling.
General DescriptionSudan dyes are classified under the azo dyes group of organic compounds that are commonly utilized as additive materials for industrial and scientific applications.
Safety ProfileAn eye irritant. When heated to decomposition it emits toxic fumes of NOx.
Properties and Applicationsred to yellow red orange. Appearance is red to yellow red orange powder, the products by glacial acetic acid crystallization melting point 180 ℃. Soluble in boiling ethanol to red. Light fastness is poorer, in 110 ℃ when stability. In concentrated sulfuric acid for deep red, dilution after dark red precipitation. The alcohol solution to join hydrochloric acid for wine red; Add sodium hydroxide as orange. Mainly used in oil, wax and cultural and educational supplies coloring.
StandardLight FastnessHeat-resistant(℃)waterSodium Carbonate(5%)Hydrochloric acid(5%)Melting pointStableISOPoor-General170-180100-110InsolubleNo changeNo change
Solvent Red 1 Preparation Products And Raw materials
Raw materialso-Anisidine–>2-Naphthol

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